Jump to main content
Jump to site search

Issue 24, 2012
Previous Article Next Article

Centrifugo-dynamic inward pumping of liquids on a centrifugal microfluidic platform

Author affiliations

Abstract

We present a method to pump liquids in a centrifugal microfluidic spinning disk from a radial outward position to a radial inward position. Centrifugal forces are applied to compress air in a cavity, this way storing pneumatic energy. The cavity is connected to an outlet channel having a lower hydraulic resistance compared to the inlet channel. The stored pneumatic energy is quickly released by fast reduction of rotational frequency. This way liquid is transported mainly through the channel with lower resistance, directing the liquid radially inwards. Pump efficiencies of >75% per pump cycle have been demonstrated for water, ethanol, a highly viscous lysis buffer and whole blood. By employing three pump cycles, water has been pumped radially inwards with an efficiency of >90%. The inward pumping requires centrifugation only, which is intrinsically available on every centrifugal microfluidic platform.

Graphical abstract: Centrifugo-dynamic inward pumping of liquids on a centrifugal microfluidic platform

Back to tab navigation

Supplementary files

Publication details

The article was received on 17 Aug 2012, accepted on 03 Oct 2012 and first published on 05 Oct 2012


Article type: Technical Innovation
DOI: 10.1039/C2LC40942A
Citation: Lab Chip, 2012,12, 5142-5145
  • Open access:
  •   Request permissions

    Centrifugo-dynamic inward pumping of liquids on a centrifugal microfluidic platform

    S. Zehnle, F. Schwemmer, G. Roth, F. von Stetten, R. Zengerle and N. Paust, Lab Chip, 2012, 12, 5142
    DOI: 10.1039/C2LC40942A

Search articles by author

Spotlight

Advertisements